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1. Equipment selection should be reasonable. Rough machine parts processing mainly cuts off most of the machining allowance, does not need high precision machine parts processing, so rough processing should have greater power and high precision machine, complete the process adhere to the use of a relatively high precision machine. Roughness and finish machining can give full play to the ability of equipment and prolong the service life of precision machine tools on different machines.

2. In order to ensure the precision of precision parts, the processing of rough and fine parts is the best. Because when rough mechanical parts are machined, the cutting force, clamping force, heat and machined surface of the workpiece have obvious hardening phenomenon. The workpiece has larger internal stress. If rough and rough mechanical parts are machined continuously, the accuracy of the workpiece will soon lose due to stress redistribution. For some high precision parts of the mechanical parts processing. After roughing and finishing, low temperature annealing should be arranged or aged to eliminate internal stress.

3. Heat treatment process is often arranged in the process route of precision parts. Location arrangement is as follows: heat treatment process to improve the cutting performance of metals, such as annealing, normalizing, tempering, generally arranged in the processing of mechanical parts. Eliminate internal stress, such as aging treatment, adjust treatment, such as general layout, rough processing, but after completion. In order to improve the mechanical properties of parts, such as carburizing, quenching and tempering, generally arranged in the processing of mechanical parts. If the deformation is large after heat treatment, the final processing process should also be arranged.